The Networker
Positioners became key elements at the field level with the onset of the Industrial Internet of Things (IIoT) and Industry 4.0. On this basis, the new Ethernet-APL industry standard promises to unleash its full potential: fast communication, proven two-wire installation and use in hazardous areas. The same holds true for SAMSON's TROVIS 3797 Positioners with PROFINET® communication. They work with Ethernet-APL technology and exchanges data 300 times faster than with today's fieldbus protocols.
Real-time data
With Ethernet-APL connectivity, the TROVIS 3797 Positioners can communicate at data rates of up to 10 MBit/s, which allows data to be transferred to asset management and cloud-computing systems almost in real time. High-speed communication forms the basis for the systematic aggregation of valve data.
Designed for use in potentially explosive atmospheres
The Ethernet-APL technology supports two-wire installations commonly used in the process industry. As a result, the specified explosion protection requirements for intrinsic safety can be fully satisfied.
Standardized communication
The positioners communicate using PROFINET® with PA Profile 4.0. A higher-level OPC UA interface makes it possible to transfer data collected and analyzed at the field level to a manufacturer-independent asset management system based on the standardized PA-DIM information model.
Ethernet-APL connectivity
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SAMSON sets new standards
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Valve monitoring
Positioners are indispensable for implementing smart communication in today's control valves. Positioners compile important data about the valves as well as the entire control process. These data shine a light on the actual valve state. At SAMSON, valve diagnostics are integrated directly into the positioners. The positioners are able to save and analyze the data directly on site. Crucial diagnostic data are available in the field but they can also be transmitted to a central asset management system.
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Monitoring functions
The monitoring functions play an important role in the valve diagnostics. They keep track of the valve while the process is running without disturbing it. The monitoring functions help reveal incorrect attachment, pneumatic leakage, low supply pressure, zero shifts as well as internal and external leakage at the valve.
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Test functions
Diagnostic tests are performed to verify the results of the monitoring functions. These tests have priority over the positioner's actual job to position the valves. The partial stroke test (PST) and full stroke test (FST), which can be performed manually or automatically, are important test functions to check whether valves can move on demand and analyze the dynamic control response.
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Status messages
The valve diagnostics integrated into the SAMSON positioners generate status messages classified according to NAMUR Recommendation NE 107. To provide a better overview of all status messages and the valve state, all status messages are summarized in a condensed state. The status message with the highest priority determines the condensed state and the action to be taken.
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Plant monitoring
Valve monitoring is based on the data logged by the positioner and the integrated diagnostic functions. However, valve diagnostics cannot provide an overall assessment of all the valves in a plant. In this case, combined solutions that make use of both valve diagnostics and a higher-level asset management system, such as SAM VALVE MANAGEMENT, are the ideal approach. Complex mathematical operations paired with a considerably broader data base from the valve history open up new opportunities for data analysis. They also enable the asset management system to verify the information on the control valves' condition provided by the positioners. As a result, all control valves linked to the system can be monitored at a glance. Users benefit from the clear instructions and maintenance recommendations provided by the system.